Inter-twin Vascular Connections
Inter-twin Vascular Connections - Related Videos
09:04
Guide Wire Assisted Catheterization and Colored Dye Injection for Vascular Mapping of Monochorionic Twin Placentas
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2011
Vascular mapping of monochorionic (MC) twin placentas after birth provides a means for detailed demonstration of vascular connections between the twins’ circulations. Imbalance of these connections is thought to play a pivotal role in the development of complications of MC twinning including twin-to-twin transfusion syndrome.
09:52
Accurate and Simple Evaluation of Vascular Anastomoses in Monochorionic Placenta using Colored Dye
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Cited by 92 •
2011
Twin-to-twin transfusion syndrome and twin anemia polycythemia sequence are two potentially devastating problems in perinatal medicine. Both disorders occur only in monochorionic twins and result from unbalanced blood flow through placental vascular anastomoses. We provide a simple protocol to accurately evaluate the presence of vascular anastomoses using colored dye injection of placental vessels after birth.
01:23
Dietary Connections
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2019
In biological systems, most metabolic pathways are interconnected. The cellular respiration processes that convert glucose to ATP—such as glycolysis, pyruvate oxidation, and the citric acid cycle—tie into those that break down other organic compounds. As a result, various foods—from apples to cheese to guacamole—end up as ATP. In addition to carbohydrates, food also contains proteins and lipids—such as cholesterol and fats. All of these organic compounds are used as energy sources to produce...
11:10
Visualization of Vascular and Parenchymal Regeneration after 70% Partial Hepatectomy in Normal Mice
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Cited by 3 •
2016
Tools used for visualizing vascular regeneration require methods for contrasting the vascular trees. This film demonstrated a delicate injection technique used to achieve optimal contrasting of the vascular trees and illustrate the potential benefits resulting from a detailed analysis of the resulting specimen using µCT and histological serial sections.
04:25
Harvesting Articular Cartilage From Joints of an Equine Donor: A Surgical Procedure to Isolate Vascular Connective Tissue From Cadaveric Joints of an Equine Donor
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2025
In this video, we demonstrate the extraction of articular cartilage from an equine cadaveric joint. The isolated articular cartilage can be used for further downstream analysis.
FAQs
The connections can link artery to artery, vein to vein, or an artery to a vein. Each arrangement provides a pathway through which blood may pass between the twins, but the clinically important issue is how these pathways collectively distribute flow. Their configuration therefore helps explain why shared-placenta pregnancies can have different circulatory effects.
Uneven exchange can create a circulation imbalance: one fetus may receive excessive blood while the co-twin receives insufficient blood. This difference can affect fetal growth and pregnancy outcomes, making the amount and pattern of inter-twin flow more important than the presence of a connection alone. Monitoring focuses on detecting this imbalance.
Blood-flow patterns matter because they connect anatomical findings with clinical risk. A vessel link is not interpreted in isolation; its structure and the way blood moves through the shared circulation help indicate whether the twins are experiencing a potentially harmful distribution of blood. This interpretation supports counseling and decisions about surveillance or treatment.
Prenatal ultrasound provides the principal assessment approach identified for these connections. Clinicians use the examination to evaluate the vascular links and their flow patterns, then apply the findings to diagnosis and ongoing monitoring. In monochorionic twin pregnancies, this assessment can help identify complications such as twin-to-twin transfusion syndrome and support clinical management.
Assessment is especially relevant when twins share a placenta, because their circulations can communicate through placental vessels. The findings help clinicians explain possible risks to families, plan surveillance, and recognize when pregnancy outcomes may be threatened by unequal blood distribution. Thus, vascular assessment forms part of care planning rather than serving only as an anatomical description.
The results can provide three clinically useful kinds of information: whether inter-twin vascular links are present, how they are arranged, and whether flow appears uneven. Together, these observations help relate placental vascular anatomy to fetal growth and pregnancy outcome. They also inform counseling, continued surveillance, and treatment considerations when complications are suspected.